| IS-IS, Intermediate System-to-Intermediate System, ISO 10589 |
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Description | Glossary | RFCs | Publications | Obsolete RFCs |
| Protocol suite: | OSI, TCP/IP. |
| Protocol type: | Interior gateway routing protocol. |
| MIME subtype: | |
| SNMP MIBs: | iso.org.dod.internet.experimental.ISIS-MIB (1.3.6.1.3.37).
iso.org.dod.internet.mgmt.mib-2.isisMIB (1.3.6.1.2.1.138). |
| Working groups: | isis, IS-IS for IP Internets. |
| Links: |
IANA: IS-IS TLV codepoints. wiki: IS-IS. |
IS-IS is an extendible intra-domain routing protocol. Each router in the routing domain issues an Link State Protocol Data Unit (LSP) that contains information pertaining to that router. The LSP contains typed variable-length data, often referred to as TLVs (type-length-values).
Type / Length values:
| TLV | Description | IIH | LSP | SNP | References |
|---|---|---|---|---|---|
| 0 | |||||
| 1 | Area Addresses. | Y | Y | N | |
| 2 | IIS Neighbors. | N | Y | N | |
| 3 | ES Neighbors. | N | Y | N | |
| 4 | Part. DIS. | N | Y | N | |
| 5 | Prefix Neighbors. | N | Y | N | |
| 6 | IIS Neighbors. | Y | N | N | |
| 7 | |||||
| 8 | Padding. | Y | N | N | |
| 9 | LSP Entries. | N | N | Y | |
| 10 | Authentication. | Y | Y | Y | |
| 11 | |||||
| 12 | Optional Checksum. | Y | N | Y | RFC 3358 |
| 13 | |||||
| 14 | LSPBufferSize. | N | Y | N | |
| 15 | |||||
| 16 | Encapsulation Cap. | N | Y | N | |
| 17 - 21 | |||||
| 22 | Extended IS Reachability. | N | Y | N | RFC 3784, RFC 5305, RFC 5307 |
| 23 | IS Neighbor Attribute. | N | Y | N | RFC 5311 |
| 24 | IS Alias ID. | N | Y | N | RFC 5311 |
| 25 - 41 | |||||
| 42 | DECnet Phase IV. | Y | N | N | |
| 43 - 65 | |||||
| 66 | Lucent proprietary. | N | Y | N | |
| 67 - 127 | |||||
| 128 | IP internal reachability information. | N | Y | N | RFC 1195 |
| 129 | Protocols supported. | Y | Y | N | RFC 1195 |
| 130 | IP external reachability information. | N | Y | N | RFC 1195 |
| 131 | Inter-Domain Routing Protocol information. | N | Y | Y | RFC 1195 |
| 132 | IP interface addresses. | Y | Y | N | RFC 1195 |
| 133 | (obsolete) Authentication Information. | N | N | N | RFC 1195 |
| 134 | Traffic Engineering router ID. | N | Y | N | RFC 3784, RFC 5305 |
| 135 | Extended IP reachability. | N | Y | N | RFC 3784, RFC 5305 |
| 136 | |||||
| 137 | Dynamic Hostname. | N | Y | N | RFC 5301 |
| 138 | GMPLS Shared Risk Link Group. | N | Y | N | RFC 4205, RFC 5307 |
| 139 | |||||
| 140 | |||||
| 141 | Inter-AS reachability information. | N | Y | N | RFC 5316 |
| 142 - 175 | |||||
| 176 177 | Nortel proprietary. | N | Y | N | |
| 178 - 210 | |||||
| 211 | Restart. | Y | N | N | RFC 3847, RFC 5306 |
| 212 - 221 | |||||
| 222 | MT-ISN. | N | Y | N | RFC 5120 |
| 223 | MT IS Neighbor Attribute. | N | Y | N | RFC 5311 |
| 224 - 228 | |||||
| 229 | M-Topologies. | Y | Y | N | RFC 5120 |
| 230 | |||||
| 231 | |||||
| 232 | IPv6 Interface Address. | Y | Y | N | RFC 5308 |
| 233 | |||||
| 234 | |||||
| 235 | MT IP. Reach. | N | Y | N | RFC 5120 |
| 236 | IPv6 Reachability | N | Y | N | RFC 5308 |
| 237 | MT IPv6 IP. Reach. | N | Y | N | RFC 5120 |
| 238 | |||||
| 239 | |||||
| 240 | Point-to-Point Three-Way Adjacency. | Y | N | N | RFC 3373, RFC 5303 |
| 241 | |||||
| 242 | IS-IS Router CAPABILITY. | N | Y | N | RFC 4971 |
| 243 - 249 | |||||
| 250 | experimental. | Y | Y | Y |
RFCs:
[RFC 1142] OSI IS-IS Intra-domain Routing Protocol.
[RFC 1195] Use of OSI IS-IS for Routing in TCP/IP and Dual Environments.
[RFC 1629] Guidelines for OSI NSAP Allocation in the Internet.
[RFC 2973] IS-IS Mesh Groups.
[RFC 2991] Multipath Issues in Unicast and Multicast Next-Hop Selection.
[RFC 3277] Intermediate System to Intermediate System (IS-IS) Transient Blackhole Avoidance.
[RFC 3358] Optional Checksums in Intermediate System to Intermediate System (ISIS).
[RFC 3359] Reserved Type, Length and Value (TLV) Codepoints in Intermediate System to Intermediate System.
[RFC 3719] Recommendations for Interoperable Networks using Intermediate System to Intermediate System (IS-IS).
[RFC 3787] Recommendations for Interoperable IP Networks using Intermediate System to Intermediate System (IS-IS).
[RFC 4124] Protocol Extensions for Support of Diffserv-aware MPLS Traffic Engineering.
[RFC 4444] Management Information Base for Intermediate System to Intermediate System (IS-IS).
[RFC 5301] Dynamic Hostname Exchange Mechanism for IS-IS.
[RFC 5302] Domain-Wide Prefix Distribution with Two-Level IS-IS.
[RFC 5303] Three-Way Handshake for IS-IS Point-to-Point Adjacencies.
[RFC 5304] IS-IS Cryptographic Authentication.
[RFC 5305] IS-IS Extensions for Traffic Engineering.
[RFC 5306] Restart Signaling for IS-IS.
[RFC 5307] IS-IS Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS).
[RFC 5308] Routing IPv6 with IS-IS.
[RFC 5310] IS-IS Generic Cryptographic Authentication.
[RFC 5311] Simplified Extension of Link State PDU (LSP) Space for IS-IS.
[RFC 5316] ISIS Extensions in Support of Inter-Autonomous System (AS) MPLS and GMPLS Traffic Engineering.
[RFC 5330] A Link-Type sub-TLV to Convey the Number of Traffic Engineering Label Switched Paths Signalled with Zero Reserved Bandwidth across a Link.
[RFC 1237] Guidelines for OSI NSAP Allocation in the Internet.
[RFC 2763] Dynamic Hostname Exchange Mechanism for IS-IS.
[RFC 2966] Domain-wide Prefix Distribution with Two-Level IS-IS.
[RFC 3373] Three-Way Handshake for Intermediate System to Intermediate System (IS-IS) Point-to-Point Adjacencies.
[RFC 3567] Intermediate System to Intermediate System (IS-IS) Cryptographic Authentication.
[RFC 3784] Intermediate System to Intermediate System (IS-IS) Extensions for Traffic Engineering (TE).
[RFC 3786] Extending the Number of Intermediate System to Intermediate System (IS-IS) Link State PDU (LSP) Fragments Beyond the 256 Limit.
[RFC 3847] Restart Signaling for Intermediate System to Intermediate System (IS-IS).
[RFC 4205] Intermediate System to Intermediate System (IS-IS) Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS).
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Description | Glossary | RFCs | Publications | Obsolete RFCs |